The Long Đại River () is a river in Quảng Ninh District of

Quảng Bình Province Quảng Bình was formerly a southern coastal Provinces of Vietnam, province in the North Central Coast region, the Central Vietnam, Central of Việt Nam, Vietnam. It borders Hà Tĩnh province, Hà Tĩnh to the north, Quảng Trị province, ...

North Central Coast Bắc Trung Bộ (literally North Central Region, and often translated as North Central Coast) is one of the geographic regions of Vietnam. It consists of six provinces in northern part of Central Vietnam: Thanh Hóa, Nghệ An, Hà Tĩnh, Qu� ...

region of

Vietnam Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...

. The river originates in the

Annamite Range The Annamite Range (; ) is a major mountain range of Mainland Southeast Asia, extending approximately through Laos, Vietnam, and a small area in northeast Cambodia. Geography The highest points of the Annamite Range are the -high Phou Bia, th ...

and flows generally northeastwards. Its total length is 77 km (48 mi). The Long Đại River creates a narrow fertile plain by its banks. Then it meets the

Kiến Giang River The Kiến Giang River () is a river in Lệ Thủy District, Quảng Bình Province, North Central Coast, Vietnam. The length of the river is 58 km. It is a tributary of the Nhật Lệ River. The Kiến Giang River originates in the An ...

, and together they form the

Nhật Lệ River The Nhật Lệ River is a river in Đồng Hới city, Quảng Bình Province, Vietnam. The Nhật Lệ River is 152 km long, of which the Kiến Giang River is 58 km in length, and the Long Đại River is 77 km long. The river i ...

. The Nhật Lệ River flows generally northeastwards before emptying into

South China Sea The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by South China, in the west by the Indochinese Peninsula, in the east by the islands of Taiwan island, Taiwan and northwestern Philippines (mainly Luz ...

Đồng Hới Đồng Hới () is the capital city of Quảng Bình Province in the north central coast of Vietnam. The city's area is . Population as per the 2019 census was 133,672. It is served by National Highway 1A, the Đồng Hới Railway Station, a ...

. The Long Đại River used to cause flooding in the

rainy season The rainy season is the time of year when most of a region's average annual rainfall occurs. Rainy Season may also refer to: * ''Rainy Season'' (short story), a 1989 short horror story by Stephen King * "Rainy Season", a 2018 song by Monni * '' ...

(from September to December). However, the severe flooding has been prevented thanks to the dam at its headstreams.

External links and references

Rivers in Quang Binh Province on Official Website of Quang Binh government
Rivers of Quảng Bình province Nhật Lệ River Rivers of Vietnam {{Vietnam-river-stub